I really like the update to the Command line, well deserved change.
Depending on your type of work there are unique benefits, such as if you are also an Inventor user or have to document other CAD systems 3D models with the updated Model Documentation tools.
I installed it, but I've got CadWorx twisted into everything I do and they won't have a build that recognizes it until July. Now when I open AutoCad 2013, I have all the CadWorx menus and keep getting "command not found" errors. Very annoying.